package com.tensquare.friend.interceptor;

import io.jsonwebtoken.Claims;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import util.JwtUtil;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
public class JwtInterceptor implements HandlerInterceptor{

    @Autowired
    private JwtUtil jwtUtil;

    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("经过了拦截器");
        final String header = request.getHeader("Authorization");
        if(header!=null&&!"".equals(header)&&header.startsWith("Bearer ")){
            //得到令牌
            final String token= header.substring(7);
            try {
                Claims claims = jwtUtil.parseJWT(token);
                String roles= (String) claims.get("roles");
                if(roles!=null&&roles.equals("admin")){
                    request.setAttribute("claims_admin",claims);
                }
                if(roles!=null&&roles.equals("user")){
                    request.setAttribute("claims_user",claims);
                }
            } catch (Exception e) {
                throw new RuntimeException("令牌不正确!");
            }
        }
        return true;
    }
}
